Across
- 2. a compound or substance that has been purified or prepared, especially artificially.
- 4. vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear.
- 8. operating by or producing electricity.
- 9. power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.
- 11. cord, tape, or fabric, woven with strips of rubber, which returns to its original length or shape after being stretched.
- 13. the quality of being hot; high temperature.
- 14. a large number of people or objects crowded together.
- 15. energy which a body possesses by virtue of being in motion.
- 16. Mechanical energy (kinetic energy or potential energy) is the energy of either an object in motion or the energy that is stored in objects by their position.
Down
- 1. relating to heat
- 3. the principle by which the total value of a physical quantity or parameter (such as energy, mass, linear or angular momentum) remains constant in a system which is not subject to external influence.
- 5. the speed of something in a given direction.
- 6. relating to the nucleus of an atom.
- 7. the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.
- 10. relating to movement toward a center of gravity.
- 12. the natural agent that stimulates sight and makes things visible.